Update maas_proxy_url logic
Update maas_proxy_url logic

This change alters the proxy detection logic following alterations in
how MTC detects and builds proxy variables utilized by Ansible.

Signed-off-by: Nathan Pawelek <83048d3cb4f963ec28a0f81011841f7c670b4014@rackspace.com>

npawelek/rpc-maas,npawelek/rpc-maas,npawelek/rpc-maas